CONTINUOUS INTERNET TELEMETRY24H DRIFT48,070 material changesacross 42,435 domains · 24h to ~60m agoNOW563 curated domains not reachablelast probe, steadySITE ERRORS34,609 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 155,944 sites429 rate-limit / 403 bot-block, a posture signal

rfsu.com

Observed Jul 25, 2026, 20:19 UTC (6d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain
Up right now
Email byMicrosoft 365
Secured byDigiCert
Also usesGoogle Search Console
1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat rfsu.com actually stands on - every host below is a signed observation
rfsu.com
A / AAAA
213.88.149.101
unattributedserves the site
NS
dns-b.buildit.netdns-c.buildit.eu
buildit.net + buildit.euanswers its DNS
MX
rfsu-com.mail.protection.outlook.com
Microsoft 365receives its email
TLS
www.rfsu.com
DigiCert Incissued its certificate

DNS Records

A 1

  • 213.88.149.101

MX 1

  • 0rfsu-com.mail.protection.outlook.com

TXT 9

  • v=verifydomain MS=ms76477567
  • _78vzrr4bi1m10ubs8syn7ndpx2dr606
  • klaviyo-site-verification=McT2CF
  • klaviyo-site-verification=NpEPe3
  • apple-domain-verification=6QLV9HND1eVPPIFa
  • anthropic-domain-verification-8qfvxz=pWNG3uwuQVW8hIV9LyBk8bVj4
  • google-site-verification=OvCHTjZElv9188z8EsmsFe_pCQRk5L1aCaWfqY725uk
  • v=spf1 include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:_spfa.buildit.net -all
  • v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email; ruf=mailto:dmarc@rfsu.com

NS 2

  • dns-b.buildit.net
  • dns-c.buildit.eu

SOA 1

  • dns-b.buildit.net hostmaster.buildit.net

TLS Certificates (3)

Common NameIssuerExpires
www.rfsu.com C=US, O=DigiCert Inc, CN=GeoTrust EV RSA CA G2 Wed, 17 Feb 2027 23:59:59 +0000
GeoTrust EV RSA CA G2 C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2 Tue, 02 Jul 2030 12:42:57 +0000
DigiCert Global Root G2 C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2 Fri, 15 Jan 2038 12:00:00 +0000

Subdomains (1)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for rfsu.com. It updates itself. It attests a signed observation - not that the site is safe.

DomainDrift signed-observation badge for rfsu.com <a href="https://domaindrift.io/t/rfsu.com"> <img src="https://domaindrift.io/badge/rfsu.com.svg" width="300" height="64" alt="DomainDrift signed observations for rfsu.com"> </a>

Ed25519 Receipt

Receipt ID
rcpt_08ff101e2ed69e21
Output Hash
3ad11b6eba8eef14426c8364f3ad5d35735b767f0103bac4c94671a0eed15914
Signature
ed25519:a6ac732a294af413bd45ceb093f9598ebca8d8005a7df65fde07eb9be490d26c7ddf67a1063045c91120f4945c16a07ce4beddc60b8a0a094c5dbfacd8ba6e0d
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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